Why convert AMR to 3GP?
AMR (Adaptive Multi-Rate) is a compressed speech codec adopted by 3GPP in 1999, the same group that defined the .3GP container in 2001. A bare .amr file and AMR audio inside a 3GP wrapper hold identical audio data. The 3GP container adds compatibility with apps and devices that require a container format rather than a raw codec stream.
How to convert AMR to 3GP
FormatFactory FREE
Add the .amr file to FormatFactory, choose 3GP as the target format, and start conversion.
Freemake Video Converter FREE
Import the .amr file in Freemake Video Converter, select the 3GP output profile, and click Convert.
SUPER FREE
Set the output container to 3GP and the audio codec to AMR in SUPER, add the .amr source file, and encode.
Programs that convert AMR
About these formats
.AMR
Adaptive Multi-Rate (AMR) audio
An AMR file is a compressed speech recording in the Adaptive Multi-Rate format, the voice codec used in GSM and 3G phones. Open it with VLC media player (free, all platforms). To use it in…
Open .AMR details →
.3GP
3GPP Multimedia File
A 3GP file is a video or audio container made for older 3G mobile phones, essentially a stripped-down MP4 built for low bandwidth. Open it with the free VLC media player, which handles 3GP…
Open .3GP details →Quality & what to watch
- AMR-NB (the common variant) records at 8 kHz and 4.75-12.2 kbps - designed for phone calls, not music, so the audio quality ceiling is low regardless of the output container.
- The 3GP container can also carry a video track; adding video later is possible once the AMR audio is inside a 3GP file.
